ITU-R Preliminary Studies for WRC-31

WRC-31 preliminary agenda Item	WRC Resolution (English only) (*)	Responsible Group(s)	Information from Responsible Group(s)
2	-	-	-
2.1	Res. 721 (WRC-23) (ex.COM6/13)	WP 1A	Doc. 1A/43 Sec. 1, 2.3 & 2.3.1 (d), Annex 15 (f), Annex 16
2.2	Res. 910 (WRC-23) (ex.COM6/14)	WP 1A	Doc. 1A/43 Sec. 1, 2.2 & 2.2.1.1 (d)
2.3	Res. 133 (WRC-23) (ex.COM6/15)	WP 4A	See BR Administrative Circular CA/270 (a)
2.4	Res. 683 (WRC-23) (ex.COM6/16)	WP 4A	See BR Administrative Circular CA/270 (a)
2.5	Res. 251 (Rev.WRC-23)	WP 5D	See BR Administrative Circular CA/270 (a)
2.6	Res. 255 (WRC-23) (ex.COM6/17)	WP 5D (1)	See BR Administrative Circular CA/270 (a)
2.7	Res. 363 (Rev.WRC-23)	WP 5B	See BR Administrative Circular CA/270 (a)
2.8	Res. 366 (WRC-23) (ex.COM6/18)	WP 5B	See BR Administrative Circular CA/270 (a)
2.9	Res. 684 (WRC‑23) (ex.COM6/19)	WP 4C	Doc. 4C/204 Sec. 3.3, 4.2 & 4.2.2 (d), Annex 16
2.10	Res. 664 (Rev.WRC‑23)	WP 7B	See BR Administrative Circular CA/270 (a)
2.11	Res. 685 (WRC‑23) (ex.COM6/20)	WP 7B	See BR Administrative Circular CA/270 (a)
2.12	Res. 686 (WRC‑23) (ex.COM6/21)	WP 7C	Doc. 7C/142 Sec. 2.2, 3.9, 3.9.1 & 8.1 (d), Annex 6 (f)
2.13	Res. 722 (WRC‑23) (ex.COM6/22)	WP 7C (2)	Doc. 7C/142 Sec. 2.2, 3.9, 3.9.2 & 8.1 (d)
2.14	Res. 235 (Rev.WRC-23)	WP 6A	See BR Administrative Circular CA/270 (a)

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(*) See Volume 3 of the Radio Regulations (2024 Edition).

NOTE - In addition to responsible groups, contributing ITU-R groups have been identified for item 2.14 (see Annex 8 of Administrative Circular CA/270 and its Addendum 1).

Notes related to the information from the Responsible Groups
a	Relevant part
b	Framework/Work Plan/Milestones/Organization of studies
c	Draft CPM text or working document towards draft CPM text
d	Chair's Report of the meeting (folder with annexes)
e	Annex including a DN or DR Rec., a PDN or PDR Rec., or WDPDN or WDPDR Rec.
f	Annex including a DN or DR Rep., a PDN or PDR Rep., or a WDPDN or WDPDR Rep.
Symbols	Rec.: ITU-R Recommendation; Rep.: ITU-R Report; DN: draft new; DR: draft revised; PDN: preliminary DN; PDR: preliminary DR; WDPDN: working document towards a PDN; WDPDR: working document towards a PDR.

Notes related to the Responsible Groups
1	Preparatory work in support of this preliminary agenda item will require extensive research, measurement, and model development activities to extend the applicability of radiowave propagation prediction methods for sharing and compatibility studies in frequency bands up to 275 GHz. Membership is encouraged to support these activities within Working Parties 3J and 3K as it is essential that this work should start within the 2023-2027 study period.
2	Initially proposed by the proponent of this agenda item to be an agenda time for WRC-27, it was included in the draft provisional allocation of ITU-R preparatory work for WRC-31. It is emphasized that this draft agenda item is asking for studies on coexistence between radiodetermination systems (WP 5B) and EESS (active) systems (WP 7C). Final decision on responsible group would be made at later stage (CPM31-1).

Notes related to the Responsible Groups

1

2

Annexes of the draft CPM Report to WRC-27
1	Annex 1 - Information on WRC-27 agenda item 10
2	Annex 2 - Information on WRC-27 agenda item 8

WRC-31 preliminary agenda Item	Topic	Title
2		on the basis of proposals from administrations and the Report of the Conference Preparatory Meeting, and taking account of the results of WRC‑27, to consider and take appropriate action in respect of the following items:
2.1		to consider potential new allocations to the fixed, mobile, radiolocation, amateur, amateur-satellite, radio astronomy, Earth exploration-satellite (passive and active) and space research (passive) services in the frequency range 275-325 GHz in the Table of Frequency Allocations of the Radio Regulations, with the consequential update of Nos. 5.149, 5.340, 5.564A and 5.565, in accordance with Resolution 721 (WRC‑23);
2.2		[to consider the possible [frequency bands] for [non-beam and beam] wireless power transmission to avoid harmful interference to the radiocommunication services caused by wireless power transmission, in accordance with Resolution 910 (WRC‑23)];
2.3		to consider the use of aeronautical and maritime earth stations in motion communicating with non-geostationary space stations in the fixed-satellite service (Earth-to-space) in the frequency band 12.75-13.25 GHz, in accordance with Resolution 133 (WRC‑23);
2.4		to consider, based on the results of ITU Radiocommunication Sector studies, support for inter-satellite service allocations in the frequency bands 3 700-4 200 MHz and 5 925-6 425 MHz, and associated regulatory provisions, to enable links between non-geostationary orbit satellites and geostationary orbit satellites, in accordance with Resolution 683 (WRC‑23);
2.5		to consider a possible primary allocation in the frequency bands [694-960 MHz, or parts thereof, in Region 1], 890-942 MHz, or parts thereof, in Region 2, and [3 400-3 700 MHz, or parts thereof, in Region 3] to the aeronautical mobile service for the use of International Mobile Telecommunications (IMT) user equipment in terrestrial IMT networks by non-safety applications, in accordance with Resolution 251 (Rev.WRC-23);
2.6		to consider the identification of the frequency bands [102-109.5 GHz, 151.5-164 GHz, 167-174.8 GHz, 209-226 GHz and 252-275 GHz] for International Mobile Telecommunications, in accordance with Resolution 255 (WRC‑23);
2.7		to consider improving the utilization of VHF maritime radiocommunication, in accordance with Resolution 363 (Rev.WRC‑23);
2.8		to consider improving the utilization and channelization of maritime radiocommunication in the MF and HF bands, including potential revisions of Article 52 and Appendix 17, in accordance with Resolution 366 (WRC‑23);
2.9		to consider possible allocations to the radionavigation-satellite service (space-to-Earth) in the frequency bands [5 030-5 150 MHz and 5 150-5 250 MHz] or parts thereof, in accordance with Resolution 684 (WRC‑23);
2.10		to consider a possible new primary allocation to the Earth exploration-satellite service (Earth-to-space) in the frequency band 22.55-23.15 GHz, in accordance with Resolution 664 (Rev.WRC‑23);
2.11		to consider an upgrade of the secondary allocation to the Earth exploration-satellite service (space-to-Earth) in the frequency band [37.5-40.5 GHz] or possible new worldwide frequency allocations on a primary basis to the Earth exploration-satellite service (space-to-Earth) in certain frequency bands within the frequency range [40.5-52.4 GHz], in accordance with Resolution 685 (WRC‑23);
2.12		to consider possible new allocations to the Earth exploration‑satellite service (active) in the frequency bands [3 000-3 100 MHz] and [3 300-3 400 MHz] on a secondary basis, in accordance with Resolution 686 (WRC‑23);
2.13		to consider studies on coexistence between spaceborne synthetic aperture radars operating in the Earth exploration-satellite service (active) and the radiodetermination service in the frequency band 9 200-10 400 MHz, with possible actions as appropriate, in accordance with Resolution 722 (WRC‑23);
2.14		to review spectrum use and needs of applications of broadcasting and mobile services and consider possible regulatory actions in the frequency band 470-694 MHz or parts thereof, in accordance with Resolution 235 (Rev.WRC-23);

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ITU-R Preliminary Studies for WRC-31

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